Knockdown megaphone.



FFL. ROSE.

KNOGKDOWN MEGAPHONE. 'APPLIGATION FILED FEB. 27, 1912.

1,044,917. Patented Nov. 19,1912.

WITNESSES INVENTOR To all whom it may concern:

of New York, in the county of New York spring out into its distendedposition.

a of a plurality of separate strips 18, 18

required size for the particular uses to substantially fiat elementshaving some relapse FRANK L. ROSE, OF NEW YORK, N. Y.

KNOCKDOWN MEGAPHONE.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed February '27, 1912. Serial No. 680,273.

Be it known that I, FRANK L. Rose, a citizen of the United States, anda. resident and State of New York, have invented certain new and usefulImprovements in Knockdown Megaphones, of which the following is aspecification, taken in connection with the accompanying drawings, whichform a part of the same.

My invention relates to amplifying sound devices and more particularlyto a knock down megaphone which may be formedof any suitable materialand of any which the megaphone is to be put.

My invention comprises such a knockdown megaphone formed of a pluralityof silient means which is put under tension when the megaphone iscollapsed and which will, by loosening a catch or similar device, causethe megaphone to automatically In the accompanying drawings showingillustrative embodiments of my invention and in' which the samereference numerals refer to similar parts in the several figures, Figure1 is a side elevation of my megaphone formed of a plurality of separateconnected hinged str1ps to permit the megaphone to be knocked down orcollapsed into substantially the position shown in Fig. 3. Fi 2 is adetail horizontal section substantia ly onthe line 2-2 of Fig. 1 lookingdown in the direction of the arrows; the figurebeing shown on anenlarged scale; and F1 ..3'is a detail sectional view partly in si eelevation substantially on the line 33 of 1, the megaphone being showncol- In my invention the megaphone is formed hinged along the lines 19,19 in any suitable manner but preferably by means of an in terposedpiece of textile material 20, Fig. 2. In this form of my invention, Iemploy any suitable form of resilient means to automatically vdistendthe sections 18, 18 when itis desired to use the megaphone. Variousforms of automatic resilient means may be employed. I have shownsimplyby way of illustration a resilient means consisting of coilsprings 21 mounted so that their longitudinal axis would substantiallycoincide with one of the edges 19 of the megaphone,

one arm of the spring bears upon one of the strips 18, while the otherarm :23 bears upon the tldjlCGllt strip 18. It is understood thatpreferably a plurality of such coil springs or resilient means areemployed and preferably, though not necessarily, one coil springfor'each of the meeting edges 19 of the sections 18, 18, though thisnumber,

'of course, may be varied without departing from my invention.

Various means 0t mounting the resilient device within'the megaphone maybe employed. Simply by way of example, I have shown the two arms 22 and.23 of the coil spring received and secured between the outer strip ofcardboard 24 and the inner strip of cardboard 25, the two with thetextile material 20 forming one of the built lapsing of the sections isresisted by the I resilient means which are thereby put under tension.The megaphone is held in its collapsed position against the action ofthe spring or springs by any suitable means. I have shown by way ofexample such a locking means in Fig. 3 where the head 26 is riveted toone of the bottom strips 18 and the bell 27 to the upper strip 18, thetwo intermediate hinge strips being preferably provided with holes topermit the head 26 to pass through them to engage the bell 27 on theupper strip. Preferably I employ two such fastening devices, as shownfor example in Fig. 1, t-he'two being duplicates.

My invention is adapted for megaphones of any and every descriptionwherein it is desirable for 'any purpose to temporarily knock them downinto a minimum space to be carried, shipped or stored. My mega-' phoneis adapted to be used with sound reproducing or recording devices, orsimply as they can be given away by the advertiser or ing secured todifierent sold at a very low figure.

Having thus described this invention in connection with severalillustrative embodiments thereof to the details of which I do not desireto be limited, what is claimed as new and What is desired to secure byLetters Patent is set forth in the appended claims.

1. In a knock down collapsible megaphone, the combination of a pluralityof I hingedsections, a coil spring mounted in cent sections,

1118' with the meeting surfaces of two adjaent sections, the arms of thecoil spring being secured to difierent adjacent sections. 2. a knockdown collapsible megaphone, the combination of a plurality of hingedsections, a coil spring mounted in line with the meeting surfaces of twoadjathe arms of the coillspring beadjacent sections, and means to holdthe megaphone in its collapsed position and the springs under tension.

3. In a collapsible knock 'down megaphone, the combination of afplurality of hinged sections, each section ormed of a plurality ofbuilt up parts, a strip of textile material in the different sectionsand extending between each pair of built up sections to form a hinge,one or more coil springs mounted along the meeting surfaces of twoadjacent sections and provided with opposed arms which are securedbetween the plies of the adjacent built up sections.

FRANK L. ROSE. Witnesses:

ALAN M. JoHNsoN, Ross MENK. I

fiopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G. M

